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computer_chess:engines:myrddin:index [2024/12/14 22:01] – jvmerlinocomputer_chess:engines:myrddin:index [2025/12/13 17:51] (current) – jvmerlino
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 ===== Myrddin ===== ===== Myrddin =====
  
-First of all, thanks very much to Ron Murawski for making this site available and hosting Myrddin's history here! =)+==== THIS SITE IS NOW OUTDATED! ====== 
 +**Go to [[https://github.com/JVMerlino/Myrddin|https://github.com/JVMerlino/Myrddin]] for the most recent Myrddin information and downloads.**
  
-Myrddin 0.92 supports SMP via processes (up to 16 instances) and is about 75-100 ELO stronger than v0.91 at 1 CPU and a further 70 ELO stronger at 4 CPUs. This version has not been formally tested above 4 CPUs so it is unknown how well it will scale above 4 CPUs.+Thanks very much to Ron Murawski for making this site available and hosting Myrddin's history here for so many years! =)
  
-==== Download ==== 
-Executable Package - [[https://github.com/JVMerlino/Myrddin/releases/tag/Myrddin092 | Myrddin 0.92]] (released 12/7/24, CCRL rating estimated at 3075 at 1 CPU and 3150 at 4 CPUs)\\ 
-Source Code - [[https://github.com/JVMerlino/Myrddin | Myrddin Source]] 
  
 == Old versions == == Old versions ==
 +[[https://github.com/JVMerlino/Myrddin/releases/tag/Myrddin093 | Myrddin 0.93]] (released 4/18/25, CCRL rating 3100)\\
 +[[https://github.com/JVMerlino/Myrddin/releases/tag/Myrddin092 | Myrddin 0.92]] (released 12/7/24, CCRL rating 3095)\\
 [[https://github.com/JVMerlino/Myrddin/releases/download/Myrddin091/Myrddin.091.rar | Myrddin 0.91]] (released 10/20/24, CCRL rating 2997 at 1 CPU)\\ [[https://github.com/JVMerlino/Myrddin/releases/download/Myrddin091/Myrddin.091.rar | Myrddin 0.91]] (released 10/20/24, CCRL rating 2997 at 1 CPU)\\
 [[https://www.dropbox.com/s/z2fkfkyxigohhp7/Myrddin%20090.rar?dl=0 | Myrddin 0.90]] (released 6/9/23, CCRL rating 2627 at 1 CPU)\\ [[https://www.dropbox.com/s/z2fkfkyxigohhp7/Myrddin%20090.rar?dl=0 | Myrddin 0.90]] (released 6/9/23, CCRL rating 2627 at 1 CPU)\\
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   * st   * st
   * hard/easy   * hard/easy
 +  * memory
   * cores   * cores
   * result   * result
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 ====Version/Change List==== ====Version/Change List====
 +
 +== Version 0.93 (4/18/25) ==
 +-- Now using IIR instead of IID\\
 +-- Minor adjustments to LMR conditions\\
 +-- Now supporting the xboard "memory" command (requested by Martin Sedlak)\\
 +-- Increased the maximum number of SMP processes to 32 (requested by Lars Hallerstrom)\\
 +-- Fixed a bug in pondering introduced in v0.90. Myrddin would restart thinking at depth 1 even if the expected ponder move was made by the opponent.\\
 +-- Fixed a rare bug that could cause Myrddin to crash when using logfiles\\
 +-- Found a bug that caused the Eval hash size to be 2MB instead of 32MB.\\
 +-- Default Transposition hash size is now 256MB\\
  
 == Version 0.92 (12/7/24) == == Version 0.92 (12/7/24) ==

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